EP0858071A3 - Dynamic tracking control in an optical recording system by diffraction-based mark formation detection - Google Patents

Dynamic tracking control in an optical recording system by diffraction-based mark formation detection Download PDF

Info

Publication number
EP0858071A3
EP0858071A3 EP98200004A EP98200004A EP0858071A3 EP 0858071 A3 EP0858071 A3 EP 0858071A3 EP 98200004 A EP98200004 A EP 98200004A EP 98200004 A EP98200004 A EP 98200004A EP 0858071 A3 EP0858071 A3 EP 0858071A3
Authority
EP
European Patent Office
Prior art keywords
signal
diffraction
medium
mfe
recording system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98200004A
Other languages
German (de)
French (fr)
Other versions
EP0858071A2 (en
Inventor
Clarke K. c/o Eastman Kodak Company Eastman
James Arthur c/o Eastman Kodak Company Barnard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/925,826 external-priority patent/US5859830A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP0858071A2 publication Critical patent/EP0858071A2/en
Publication of EP0858071A3 publication Critical patent/EP0858071A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G11B7/0904—Dithered tracking systems

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

An apparatus and method for providing dynamic tracking error detection and control in an optical recording system in which an incident beam records data on a medium in the form of marks. A diffraction-based mark formation effectiveness (MFE) signal is generated by monitoring a reflected write signal in part of the return beam aperture or in multiple zones of the return beam aperture and is indicative of a characteristic of the marks formed on the medium. A position signal is generated to provide an indication of cross-track movement of the incident beam relative to a tracking structure on the medium. The tracking structure may be a wobbled groove on an optical disk recording medium. Variations in the diffraction-based MFE and position signals are correlated to provide a dynamic tracking error signal (TES). The diffraction-based MFE and position signal variations may be correlated by, for example, multiplying the two signals together in a multiplier circuit, or using the position signal to control application of the diffraction-based MFE signal to particular inputs of a signal difference circuit. The dynamic TES may be utilized in a servo loop with or without a push-pull signal or other conventional tracking signal.
EP98200004A 1997-01-09 1998-01-02 Dynamic tracking control in an optical recording system by diffraction-based mark formation detection Withdrawn EP0858071A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US3466497P 1997-01-09 1997-01-09
US34664P 1997-01-09
US08/925,826 US5859830A (en) 1997-09-05 1997-09-05 Dynamic tracking control in an optical recording system by diffraction-based mark formation detection
US925826 2001-08-09

Publications (2)

Publication Number Publication Date
EP0858071A2 EP0858071A2 (en) 1998-08-12
EP0858071A3 true EP0858071A3 (en) 1998-08-19

Family

ID=26711231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98200004A Withdrawn EP0858071A3 (en) 1997-01-09 1998-01-02 Dynamic tracking control in an optical recording system by diffraction-based mark formation detection

Country Status (2)

Country Link
EP (1) EP0858071A3 (en)
JP (1) JPH10255288A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5363360A (en) * 1993-09-27 1994-11-08 Eastman Kodak Company Method and apparatus for detecting and processing synchronization marks extracted from a prerecorded wobbled groove on a compact disk
US5434834A (en) * 1991-08-28 1995-07-18 Mitsubishi Denki Kabushiki Kaisha Optical recording and reproducing apparatus for tracking wobbling guide grooves
US5440534A (en) * 1994-01-10 1995-08-08 Eastman Kodak Company Method and apparatus for maintaining a recording light beam in an on-track position on a recording medium
US5495466A (en) * 1994-01-10 1996-02-27 Eastman Kodak Company Write verification in an optical recording system by sensing mark formation while writing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5434834A (en) * 1991-08-28 1995-07-18 Mitsubishi Denki Kabushiki Kaisha Optical recording and reproducing apparatus for tracking wobbling guide grooves
US5363360A (en) * 1993-09-27 1994-11-08 Eastman Kodak Company Method and apparatus for detecting and processing synchronization marks extracted from a prerecorded wobbled groove on a compact disk
US5440534A (en) * 1994-01-10 1995-08-08 Eastman Kodak Company Method and apparatus for maintaining a recording light beam in an on-track position on a recording medium
US5495466A (en) * 1994-01-10 1996-02-27 Eastman Kodak Company Write verification in an optical recording system by sensing mark formation while writing

Also Published As

Publication number Publication date
EP0858071A2 (en) 1998-08-12
JPH10255288A (en) 1998-09-25

Similar Documents

Publication Publication Date Title
US4787075A (en) Optical information recording medium and apparatus for recording/reproducing information using the same
CA1303733C (en) Tracking servo system for disc memory
EP1118983A8 (en) Optical disc, and reading system and manufacturing method of the disc
EP0874356A3 (en) Optical disc discriminating system
EP0801382A3 (en) Optical information recording/reproducing device and method for recording/reproducing information
EP1515317A3 (en) Tracking servo control method
MY130581A (en) Write once optical disc recording apparatus
EP0439196B1 (en) Optical disk
EP0363022A3 (en) On/off-track signal in optical information recording and/or reproducing apparatus
US4498159A (en) Track deviation detecting apparatus
EP0910077A3 (en) Magneto-optical recording/reproducing apparatus and method
EP0554092A1 (en) An optical information recording and reproducing device
US5148424A (en) Detrack detecting system in an optical recording/reproducing apparatus
EP0753851A3 (en) Information recording medium and tracking error signal detection apparatus and magnetic recording apparatus and method of adjusting the magnetic recording apparatus
US5136567A (en) Photo-detecting device
EP0779613A3 (en) Optical disk apparatus
EP1291856A3 (en) Information reproduction apparatus and optical recording medium
EP1191524A4 (en) Multilayer optical disk, and method and device for recording optical information thereon
CA2005341A1 (en) Recording and/or reproduction apparatus of an optical disc
EP0858071A3 (en) Dynamic tracking control in an optical recording system by diffraction-based mark formation detection
EP1022733A4 (en) Information recording medium and information reproducing apparatus
JPH0782656B2 (en) Optical disk device
EP0944079A3 (en) Disc player
JP2598776B2 (en) Optical information recording medium
EP0974958A4 (en) Optical disc device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
RBV Designated contracting states (corrected)
17P Request for examination filed

Effective date: 19990327

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20000926

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20010207